I would imagine he went digital for commercial reasons. If you have a name and make money out of being a 'photo technique master' then why restrict yourself to a backwater? Go for the big pond (digital) as there are richer pickings there. Even Barry Thornton was quick to see where had had to go to continue to earn a good living. Its funny, because back then he was using matt inkjet papers (no good gloss was available without bad metamerism) yet he went raving away (never using matt paper in his darkoom). He had to, but I know from experience that those matt inkjets, even the best back in 2001-2002) were not even in the same galaxy as a top notch silver print apart from when comparing evil negs that were almost unprintable.
Keep shooting film if it floats your boat. its not about what others do. i have shot a 3 year project on film. Why? not because it was easy, but because I love the results, the beautiful prints, the fidelity and a whole host of other reasons - my choice. I may shoot more digital in the future, but once again it will have nothing to do with what other people are doing.